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510 mini hard to pump


Copper BB
My 510 mini is very hard to pump. Can anyone recommend some way to loosen the action so my grandson can pump it?
Need a little more info. How old is the gun? Idea of how many rounds through it?
I would start with a disassemble, (look for any scrapping of parts), a good cleaning and some gun oil.
Thanks for the response. I'm a little slow getting back in ... got lost in space. Bought the weapon new three years ago. It has only had maybe 20 rounds fired. I disassembled the weapon recently but I will again paying more attention to any scrappings.